INVESTIGATING THE POSSIBILITY OF DOMESTIC WASTEWATER TREATMENT USING ACTIVATED SLUDGE TECHNOLOGY ADDED BACILLIUS SP.

Abstract

Investigating the possibility of domestic wastewater treatment using activated sludge technology added bacillus sp. is operated at three Organic loading rate (OLR) ( 0.48; 0.64 and 0.96 kg COD/ m³.day) for purpose of searching the simple, effective and useful method that can be applied for small treatment scale such as dormitory. The experimental results  indicate that at the microorganism density about 10⁸ CFU/mL has the highest  removal efficiency may achieve the Vietnamese technique standard QCVN 14:2008/BTNMT, type B; The Hydraulic rention time (HRT) are 8, 6, 4 hours; Besides, bacillus sp. also has ability to reduce NO­₃^- concentration in aeration condition, therefore it can be applied to alternate for anoxic tank.